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This research presents a significant advancement in quantum error correction by introducing asymptotically good Fock-state codes that effectively handle linear photon loss rates, overcoming previous sublinear limitations. By leveraging random classical indexing structures to enforce bounded per-mode occupancy, the new design extends coherence lifetimes and enhances robustness against amplitude-damping noise, which is critical for scaling fault-tolerant quantum computation.
Quantum codes now protect against more photon losses than before
New Fock-state codes address limitations in protecting against photon losses, a key challenge for quantum codes.
Dor Elimelech, Arda Aydin, and Alexander Barg have constructed new quantum codes that address a limitation in protecting quantum information from photon loss. Existing quantum code families correct only a sublinear number of photon losses under common noise conditions, creating a vulnerability as noise increases; this work overcomes that restriction. Unlike many current designs, the new codes introduce randomness through their classical indexing structure, and also feature bounded per-mode occupancy to increase the coherence lifetime of…
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